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Finding the Fourth Proportional to 656,641.80, 984,962.70 and 445,134.60

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Solution

The fourth proportional to 656,641.80, 984,962.70 and 445,134.60 is: 667,701.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,641.80 : 984,962.70 = 445,134.60 : x
  2. Step 2: Convert to fraction form
    656,641.80/984,962.70 = 445,134.60/x
  3. Step 3: Cross multiply
    656,641.80x = 984,962.70 × 445,134.60
  4. Step 4: Simplify right side
    656,641.80x = 438,440,977,479.42
  5. Step 5: Solve for x
    x = 438,440,977,479.42/656,641.80
  6. Step 6: Final answer
    x = 667,701.90

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.